Everything.
In time.
One clean signal. Know where your sound lands.
A little help getting in sync
In vMix: add this address as a Web Browser input at 1920 × 1080. Enable Keyboard Enabled on the input to enter your ident, then disable it to restore vMix shortcuts. Click Start here and enable the input’s audio on your chosen bus.
Read the cursor when you hear the pulse. Left of zero means audio is early; right means audio is late. Numbers show milliseconds and equivalent frames at your chosen rate. This is a manual visual check, not an automatic measurement.
The test flashes at zero and repeats about every two seconds. Click the top-right corner to reveal Stop / Settings. Audio is a short 1 kHz pulse at −18 dBFS peak.
The background is transparent while running. A regular browser may display transparency as white; vMix reveals your background underneath. Open a dark browser preview to inspect the white graphics outside a production application. Browser rendering is not genlocked to your production frame clock.